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e+e- e+e e+e- X(3940) e+e- (4S) (2S) pp e+e- B J/ J/ e+e- e+e- e+e- J/ c c X(3940) e+e- e+e- e+e- J/ (c e+e- (2S) (c c)res c)res e+e- J/ (c c)res e+e- J/ D e+e- J/ c c c(2S) X(3940) X(3940) X(3940) DD, DD J/ e+e- J/ (c c)res e+e- J/ (c c)res e+e- (2S) (c c)res J/ e+e- e+e- J/ c c c(2S) X(3940) X(3940) X(3940) DD, DD, J/ e+e- e+e- J/ (c c)res (c c) (c c) QCD/mc 0 V J/ (2S) pp J/ e+e- s 10.6 2 e+e- J/ X e+e- J/ + gg 0.45 - 0.8 e+e- J/ + g J/ e+e- 1.1-1.6 e+e- J/c 0.05-0.1 c e+e- J/c c X(3872) B XK c1(2P ) c1(2P ) 80 /c2 J/ X(3872) D0 D0 D0D0 Y (4260) JP C = 1-- e+e- CP B 1.5 17 150 92% 4 e+e- B - 46.2 J/ B (4S) e+e e+e- J/ X J/ e+e- J/ c c e+e- e+e- J/ X X X Mrec(J/) = (ECMS - EJ/)2 - p 2, J/ EJ/ p J/ J/ J/ J/ J/ /c2 3.0 /c2 c e+e- J/ c c J/ e+e- Mrec 2110 1 2 3 4 5 Mrec(J/) GeV/c J/ 3.0 /c2 J/ J/ J/ M =30 /c2 Mrec(J/)3.0 /c2 ec Mrec 3.0 /c e+e- J/ J/ e+e- J/ c /c c0 3.4 /c2 c(2S) 3.6 /c2 N /0.1 GeV/c 2 2.5 3 3.5 Mrec(J/) GeV/c J/ J/ c N =67+ 13 c c - M =(2.9620.013) /c2 c0 c(2S) c N = 39+ 14 N (2S) = 42+ 15 c0 - 13 c - M = (3.403 0.014) /c2 M (2S) = (3.622 0.012) /cc0 c c c0 c(2S) (3.62 - 3.64) /c2 -2 ln(Li / Lmax) Lmax Li i N = 6.7 N = 3.3 N (2S) = 3.4 c cc e+e- J/ c N/20 MeV/c 5.0 J/ c c0 c(2S) c c 16% J/ J/ e+e- J/ c c B>+0.0(e+e- J/ c ()) B>2 = (0.033 0.009). -0.0 - 155 e+e- J/ c 3 J/ c e+e- J/ J/ J/ (2S) e+e- (2S) (2S) J/ 3 /c2 c J/ J/ 2.2 2.6 3 3.4 3.Mrec(J/) GeV/c J/ c c0 c(2S) J/ c1 c2 (2S) N/20 MeV/c c J/ c0 c1 c2 c(2S) (2S) J/ (2S) e+e- J/ (c c)res (c N M [ /c2] N B>2 c)res c 235 26 2.972 0.007 10.7 25.6 2.8 3.J/ -14 20 (< 27) < 9.c0 89 24 3.407 0.011 3.8 6.4 1.7 1.c1 + c2 10 27 (< 57) < 5.c(2S) 164 30 3.630 0.008 6.0 16.5 3.0 2.(2S) -26 29 (< 35) < 13. c1 c2 J/ c1 c2 (2S) % e+e- J/ (c c)res J/ J/ c J/ c0 J/ c(2S) J/ J/ J/ J/ J/ | cos | | cos | | cos | | cos | (1 + cos2 ) 2c c 1c0 c2c(2S) c(2S) 10 0.2 0.4 0.6 0.8 0 0.2 0.4 0.6 0.8 |cos(prod)| |cos(hel)| | cos | | cos | e+e- J/ c e+e- J/ c0 e+e- J/ c(2S) cos cos prod = hel N/0. J/ A(1 + cos2 ) J/ e+e- J/ (c c)res (c L = Lmin c)res c 1.4+1.1 0.5+0.7 0.93+0.57 -0.8 -0.5 -0.c0 -1.7 0.5 -0.7+0.7 -1.01+0.38 -1 -0.5 -0.c(2S) 1.9+2.0 0.3+1.0 0.87+0.86 -1.2 -0.7 -0. prod = hel | cos | | cos | prod = hel c c(2S) = 1 p c0 -1 0.25 J/ e+e- (2S) (c (2S) c)res J/+- (2S) Mrec J/ c c0 c(2S) Mrec(J/) 2.2 2.6 3 3.4 3.Mrec((2S)) GeV/c (2S) c c0 c(2S) J/ c1 c2 (2S) e+e- (2S) (c c)res (c N N (e+e- (2S) (c B>c)res c)res) c 36.7 10.4 4.2 16.3 4.6 3.J/ 6.9 8.9 (< 22) < 16.c0 35.4 10.7 3.5 12.5 3.8 2.c1 + c2 6.6 8.0 (< 20) < 8.c(2S) 36.0 11.4 3.4 16.0 5.1 3.(2S) -8.3 8.5 (< 15) < 5.N/20 MeV/c J/ c1 c2 (2S) J/ c1 c (2S) % (2S) B>0 e+e- J/ c, J/ c0 J/ c(2S) J/ J/ (e+e- J/ J/) B>2 9.1 J/ c e+e- (2S) c (2S) c(2S) c(2S) e+e- J/ (c c)res J/ e+e- J/DX J/ D+ D0 - 46.2 J/ D J/ D0 e+e- J/ D+ D+ D0 + D0 K-+ K-K+ K--++ KS+- K-+0 J/ D0 D0 D0 K-+ D0 K-K+ B p > 2.6 /c p- > 2.6 /c p > 2.6 /c, (D0)D+ + B J/ D+ M(D0+) J/ D+ J/ M(D0+) 0 + A M(D0+) - MD - M + D+ ND = 10.5+ 3.6 - 3. D+ J/ e+e- c DX c J/ M(D0+) J/ + ND = 0.4 0.3 + 3.+ J/ D+ NJ/D = 10.1 - 3. J/ D+ M(D0+) J/ J/ D0 J/ D0 M(K-+) J/ D0 J/ + 5.ND = 15.9 J/ - 4. ND = 1.0 0.8 D0 + 5.J/ D0 NJ/D0 = 14.8 - 4. J/ D0 3.4 a) b) 3.3.3.2.2.8 2.01 2.02 2.03 2.01 2.02 2.M(D0+) GeV/c2 M(D0+) GeV/c3.4 c) d) 3.3.3.2.2.8 1.81 1.86 1.91 1.81 1.86 1.M(K-+) GeV/c2 M(K-+) GeV/c M(+-) M(D0+) M(D0+) M(+-) M(K-+) M(K-+) N/1 MeV/c + M(l l ) GeV/c N/4 MeV/c + M(l l ) GeV/c e+e- J/D+X e+e- J/D0X J/ D+ J/ D J/ D e+e- J/c c J/ D+ J/ D0 J/ D+ = (4.1 1.0) 10-4 J/ D0 = (3.7 0.8) 10- + 0. (e+e- J/D0X) = (0.92 0.21) - 0.+ 0.(e+e- J/D+X) = (0.53 0.14) - 0. e+e- J/ c c c D0 D+ 1.19 0.c J/ D0 J/ D+ + 0.(e+e- J/ c = (0.91 0.23). c) - 0. e+e- J/ c c - c + Hc =D0 D+ Ds + Dc K-+ K-++- + D+ K-++ Ds K-K++ + pK-+ c J/ Hc J/ 2.7 /c2 < M(+-) < 3.5 /c2 + M - = 10 /c2 Hc Hc + Hc M - J/ + c + J/ D0 D+ Ds 40 a) b) 30 20 10 0 2.8 3 3.2 3.4 2.8 3 3.2 3.M(l+l-) GeV/c2 M(l+l-) GeV/cc) d) 2.8 3 3.2 3.4 2.8 3 3.2 3.M(l+l-) GeV/c2 M(l+l-) GeV/c +- + D0 K-+ D0 K-++- D+ K-++ Ds K-K++ N/10 MeV/c N/10 MeV/c N/10 MeV/c N/10 MeV/c J/ Hc J/ J/ Hc N N J/ Hc H B(Hc) c Hc c c f(c Hc) c Hc N N H B(Hc) f(c Hc) c c D0 K-+ 49.6 13.3 0.016 0.001 D0 K-++- 53.0 21.2 0.016 0.002 D+ K-++ 56.2 15.4 0.027 0.002 + Ds K-K++ 23.8 9.4 0.013 0.002 + K-p+ 3.0 4.2 0.018 0.003 c J/ Hc Hc Hc e+e- J/ c e+e- J/ X c J/ c c Hc (e e- J/ c + (e+e- J/ c c) c) = = 0.67 0.12, (e+e- J/ X) (e+e- J/ X) Hc 2 Hc c J/ NJ/ = 5002 88 e+e- J/ c J/ c 0 + + 0.5 (ND + ND + ND + N ) + N(c (e+e- J/ c c) c)res c s = = (e+e- J/ X) NJ/ 0 + + 0.5 (ND + ND + ND + N ) + N + N + N (2S) c c c0 c s = + NJ/ (2S) (2S) N + N + N(2S) B((2S) J/X) c cc(2S) + = + B((2S) J/+-)(2S)J/ - NJ/ 0.5 (7240 1240) + (458 42) = = 0.82 0.15 0.14. (5002 88) J/ - Mrec(J/) /c Mrec(J/) - 2MD e+e- J/ (c c)non res e+e- J/DD e+e- J/DD X(3940) 5.0 X(3940) = (39 26) /c DD X(3940) 1c(2S) c c12 2.5 3 3.5 4 4.Mrec(J/) GeV/c J/ (2S) J/X e+e- J/ (c c)res c N M [GeV/c2] N c c 501 44 2.970 0.005 15.c0 230 40 3.406 0.007 c(2S) 311 42 3.626 0.005 X(3940) 266 63 3.936 0.014 N/20 MeV/c D()D X(3940) D D X(3940) 2 - 3 D D0 D+ J/ e+e- J/X(3940) D()D D D J/ D J/ D D D D J/D*D* J/DD* J/DD 1.6 1.8 2 2.2 2.Mrec(J/D) GeV/c J/ D D 2.2 /c2 e+e- J/DD DD D N/20 MeV/c D NDD = 86 17 D ND D = 55 18 D D e+e- J/DD |Mrec(J/ D) - MD| < 70 /c2 e+e- J/DD |Mrec(J/ D) - MD | < 70 /c2 X(3940) DD() J/ D D e+e- J/DD D e+e- J/DD X(3940) DD D X(3940) D D X(3940) DD D D Mrec(J/) Mrec(J/) e+e- J/DD e+e- J/DD X(3940) DD [A + B Mrec(J/)] Mrec(J/) - MD - MD (24.56.9) 5.0 X(3940) (3.943 0.006) /c2 (15.4 10.1) /c2 X(3940) a) b) 3.8 4 4.Mrec(J/) GeV/c Mrec(J/) e+e- J/DD e+e- J/DD D X(3940) 0.2+4.4 -3. X(3940) DD X(3940) DD X(3940) /c2 X(3940) <52 /c2 B Y (3940) J/ Y (3940) 100 /c2 X(3940) N/10 MeV/c 15.4 10.1 /c2 X(3940) Y (3940) X(3940) Y (3940) X(3940) J/ +-0 J/ J/J/ J/ (J/) X(3940) J/ J/ J/ X(3940) Mrec J/ M(J/) M(J/) |Mrec(J/)-MJ/|<100 /c DD 1.9+3.2 7.-2. a) b) 4.3.2.5 3 3.5 3.8 4 4.Mrec(J/) GeV/c2 M(J/) GeV/c Mrec(J/ ) M(J/ ) M(J/ ) 30 /c2 < |M(+-0) - M| < 50 /c2 X(3940) J/ N/10 MeV/c M(J/ ) GeV/c e+e- J/X(3940) Q2 X(3940) B> B>2 = (10.6 2.5 2.4). X(3940) DD B>2(X(3940) DD) X(3940) DD DD + B>2(X(3940) DD) = (96 22)% - (> 45% ), X(3940) B>2(X(3940) DD) X(3940) DD J/ B(X(3940) DD) < 41% B(X(3940) J/) < 26% X(3940) e+e- J/ (c c)res s mQ (e+e- J/ + c) 33, e+e- J/ c c e+e- J/ c c X(3940) X(3940) = c(3S) c(3S) J/ e+e- J/ X e+e- J/ c J/ e+e- c J/ e+e- e+e- J/ c +0.0(e+e- J/ c ()) B>2 = (0.033 0.009). -0.0 c(2S) M (2S) = (3.626 0.005 0.005) /c2. c e+e- J/ c e+e- J/ c0 e+e- J/ c(2S) e+e- J/ c c J/ c c(2S) J/ = 1 e+e- J/ c0 J/ -1 J/ 0. e+e- (2S)(c c)res e+e- J/(c c)res J/ e+e- e+e- J/ D0X e+e- J/ D+X J/ D0 J/ D+ e+e- J/ c c J/ e+e- J/ c c (e+e- J/ c c) = 0.82 0.15 0.14. (e+e- J/ X) X(3940) e+e- J/X(3940) (e+e- J/X(3940)) B>2(X(3940)) = = (10.6 2.5 2.4). MX(3940) = (3.943 0.006) /c2, X(3940) < 52 /c2. X(3940) DD + B>2(X(3940) DD) = (96 22)% - > 45% X(3940) DD X(3940) J/ B(X(3940) DD) < 41% B(X(3940) J/) < 26% e+e- s 10.6 c e+e- s 10.6 c e+e- s 10.6 e+e- J/ e+e s 10.6 e+e- c c D0 - D c c e+e- s 10.58 e+e- s 10.6 J/ (2S) pp s = 1.8 J/ c pp s = 1.8 (2S) J/ (2S) pp s = 1.8 S P Bc Bc J/ J/ e+e B K+-J/ +-J/ /c2 e+e J/ e+e e+e- s = 10.6 e+e- e+e- J/ c s = 10.6 (e+e- J/ c) J/ c e+e- c
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